Charging device.



Nm864,053.4 -PATENTED AUG. 2o, 1907'. T.' P. m. G. WITHBRBEB.

GHARGING DEVICE. APPLIogTIoH rm-:D JAN. 19, 190e-l 3 SHEETS-SHEET 1.

PATENTBD AUG. 20, 1907. 'I'. F, & G. WITHERBEE.

x HARGING DEV-1GB.'

APFLIOATION P ILBD JAN. 19, 190e.

3 SHEETS-SHEET 2A KQ) El NM. m

QM. QN lvm! ihm.

aff

8 N M ml W. .m a .W sul u SQ@ No. 864,053, PATENTE AUG. 2o, i907.

' T, as; J. G, WHEERBEE.

GHARGNG DEVICE. AIPLIOATION FILED JAN.19.1906.

3 SHEETS-SHEET 3.

"Teoras-refiners v Wrfrnnannn Ann JOHN ornirAN' WITHERBEE`, or DURANGO, I MEXIooL- enano-frire perron.

speciscasioaj @frm-,ters essere.

Patented Aug. eo, roo-7. Y

Applica-son ned Janus-i519', 1906. seria No. 296,800.

and-. oHN'lGiLMAN' Wrrnnnnn; both citizens or" the' United States, residents ot Durango, the State oi Durango, Mexico, have invented a vnew and lunV r11@ simpa objects ornamenti@ are to essere the distn'ibutionfo 'the C hrge'- tolje underinore perlect control than has heretofore beenl the vcasegalso to 1 -'provide for a inorehefdcientA 'mixing-oi the lelements oi 1 5 the charge, snd-toprovide.a gas seal, the apparatus ALheirig adapted to the nlreo the modern skip-hoist;

ascending gases iwander for thegaseous i ""Zfcirclulation totalte irregular and va gxchannels, at

times-goii'ig'uup'theA outside nent 4to the lining, and at other times pssing'npvthrongh theicenter. In the rsty case it isn-very destructive to meine-prick lining,

v and'in both casesit'isjiatalfto economy and to a' lZi good quality o 'pi'odu'ct-'l Such ahnorrnel conditions of circulation are 'dueto theggses seekingand following',

A' the lines oi least resistance, Bitch lines being generally -idue toiaultycharging apparatus andlaclr-oi a proper mining; oi Athe charge .The damage trouble' does fnot endwitha poor duality oi product:V or a. high fuelA 4. lconsumption, but is accompanied by" many disadyam 'U-tage 'such as .dust-throwing, slips, andsof-c alled.- ein jplosionsj 'the latternot l inreqiiently being'v accompajjnied-by-loss otlii and great-financial loss. g

i Mot.furnacesl are-equipped ivith a single charging `ioell, 'or some other form oi apparatus not per 'rntingmyvs'risnonm the' serienummer the harge, -or mixing -oithe materials vprevious-to .charging thern into the furnace,4 and when a ininece is' so 40' equipped the manager is` powerless either to avoid the I troubles mentioned above, orto escape theconseyqu'ences. Y s' Our 'invention isfdesignfed to coinpletely overcome -the defects of thesingle'leiis and all apparatus with a I xed and nnvarying method of distribution; lt is -designed lto locate the' charge in several places at'the Stock line, and also to provide ora perfect mining of the materials of the-charge.` Reference. vis to be had to the accompanying draw'- ings forming a parmi this specrscarion, in which similarcharactersl of reference indicate corresponding parts i both-the'ligur'es.

Figure l central vertical section ofthe upper part 'of a vblast furnace, with a preferred form or' a portion oi our inventionapplied thereto; Fig. 2 is a sirni-l @grillen .oi a portonef'a charging device,4 sognerzhat 'modified and alsdenihodying the principle o f our." I

invention; Fig. 3 is a diagrammatic side elevation' oi a part =oa furnace plant, indicating cert-ain control- .ling devices which constitute a-part oi our invention; Fig. 4 Ais a fragmentary end eleiation 'ofthe samef Fig. 51's aside elevationonan enlarged scale oi certain" details shown in 3;v and Fig..6 is-an end elevation of the parts-shown in'Figf. Eig;- .7 is adiagrammatic side elevation oi'camsar'ranged v-ior dividing-thecycle; 65 Ainto,quantities of iths; and Fig. 8- is a somewhat similar View showingcam's 64b, 65h, 66h, so arrangedaeto distribute three charges in one position oi the bell,

The furnace l is as usual provided with opening 4 in its upper part, in which is located a hopper 3havln the practicalworkiugoihlast inmaces, especially i the larger ones, a'tendency' has been developed for the i -ing'water-"cooling passages 6 located in its walls. These-A passages may loe formed by coring, casting pipes in the -ring, orin any other desired manner, and are intended to be connected With a source ofturpply by ineens oi which lthe tv'ater is admitted under avery. low head; A The ring is also proyided with a tfery long outlet leg, s'o: that e suction will be caused .tol aspirato the Water. v through the 'ring and eliminate any chance of Water entering the furnace as a-result of the possiblebreakageoi the'ring. The ring shown as rigidly'A mounted upon the hopper v2, hutit lWill oe understood that it may be niadevrnovable and adjustable Without departingrom the spirit oi our invention. The bottom oi' the hopper is normally closed by a-bell 7. This bell is capable'of passing through the bottom lof the hopper and the ring l5, so that it can assume either one of the two posit-ions 90 shown in dotted lines. gihen in the upper-position short-n in dotted'lines, material passing into the hopper will flott inwardly toward the center ofthe furnace, and. consequently vWhen it is desired to iill the center oi the furnace the bell will' be placed in 'this position. When the belll is in the lower dotted position', material Corning '.roin the hopper-Will-strike the surfaces 0i the hell andv oe forced outwardly toward the lining oi the im nace. When the bell is in the position shown in iin-lll l lines, materiale/'ill slide down the conical surface oi the l0@ bell,- strike the ring 5; and oe forced to a still further degree ytoward the lining. It will be seen that the soleoiiice oi the bell is that of a spreader, and it is not irlh tendedto act as a gas seal for the hopper.

'The hopper Sisprovided with an upper'conical por= tion 8, and these two vparts together constitute a lay-pass chaiu'be'r underneath a second hopper 9 into'which the material is fed in the manner to be described. The

charges of material a othenehangingd f tot,

vice. It is provided with a downward]y-extending flange 12, having a track 13 en its lower edge. This track bears upon grooved wheels 14 mounted on the side of the hopper 9 or anyl other stationary part of thedevice. The chute is provided with an external gear 15 meshing with a gear or pinion 16, driven in any ordinary or desired manner to provide for rotating -the mixer. The lmixer is also provided with a series of corrugations or ribs 17 extending radially along the inside conical surface thereof. It will be seen that the rotation of this mixer will result in the carrying of the material around with it to a certain degree on account of the ribs orcorrugations 17, and that the material will in this manner be retarded suiiiciently so that it will not be too rapidly discharged into the hopper 9. The bottom oi the mixer lis controlled by an upwardly-opening bell l8.` The upper hopper is provided with a flange 19, and with an annular cup 20 the outeredge oi which is lower than the upper edge of the flange 19. This annular cup is preferably filled with water or any other liquid, to aiford a gas seal between the hopper and the rotary mixer, the mixer being provided with a depending flange 21 entering the liquid throughout its circumference.

For operating the bells 7, 10 and 18, many .different kinds of mechanism may be employed. That with which we have chosen to illustrate our invention comprises a hollow tube 22 rigidly connected with the bell 418, a hollow tube 23 rigidly connected with the bell 10 and passing through the tube 22 and extending above'it, ,and a rod 24 connected with the bell 7, passingthrough the tube 23 and extending above it. l Each of these manipulating deviccsfor the bells is pivotally connected with a'lever, these levers being numbered respectively 25, 26 and 27, and all of them being pivoted on a stationary standard, as for example 28. The levers are preferably manipulated by means oi pressure cylinders 29, 30, 31 and 32,. these levers being provided with piston rods 33, 34 and 35, and the piston rods being pro- -vided respectively with pistons 36, 37 and 38. These pistons are located respectively in the cylinders 29, 30

-' and 32. The bottom of the cylinder 32 is provided with' a piston rod 39, which is rigidly connected with apiston 40 located in the cylinder 31. The bell 18 is revoluble and turns when in action, for the reason that the fuel in the bottom of the revoluble chute connects the chute with the bell. Owing to they fact that the bell 18 rotates, the danger of clogging and the loss oi 'power from friction are avoided, and the action o the charging apparatus is rendered more satisfactory.

The pistons 36 and 37 work in the ordinary manner tomanipulate the bells 18 and 10. As the bell 7 has to be set inthree different positions, additional operatmg means have to be provided. The pistons 38 and 40 ,are located in the position illustrated, when the bell is in'the position shown in fullv lines. When it is desired to raise the bell, pressure-fluid is admitted above the piston 38 so that said piston is lowered in the cylinder 32. When it is desired to lower' the bell rornthe position shown in full lines, pressure-Huid i's admitted be- In operation, the gear 15 is provided with a number in the chute, and until the skip-cai' has nearly reached i the bottom oi the skip, when it is again returned to its slower motion, preferably by automatic mechanism constituting a part of the present invention. Meanwhile, by hand manipulation', or automatically, as desired,v pressure is being admitted to thetop of the p iston 36 in such a way that the bell 18 will be slowly raised in order that the contents of the chute may be slowlyV discharged into the hopper 9. This is done so that the materials may be evenly distributed in the hopper through the rapid rotation of the chute.

By the use of an upwardly-opening bell in the chute, thematerials are caused to-convergc to the center of the hopper below, on account of the converging sides of the chute. The bell 10, being lowered through the operation of the piston 37, causes th'e materials to be deflected to the lower part of the hopper 2 i the spreader bell 7 is in its raised position, or if it is in its lower posivtion it scatters them into the small annular ring. If

this bell is in its central position it'scatters them onto the ring 5 and so distributes them in a large circlein the furnace. It will thus be seen that th materials are constantly being mixed through their descent into the furnace, and so by means of the apparatus as a whole, proper mixing 'and aperfect distribution are provided to suit the regular or varying conditionsjof furnace operations.

It will be readily understood that thereare many modicationswhi'ch our invention may take, and that it is not limited to the construction described above. One of these modifications is shown in Fig. 2, Ain which the hopper 9 and bell 10 are dispensed with, and instead',A an upwardly-opening bell 42 is provided for closing the opening 4 'in the hopper 3. This bell is connectedv with a tube 43 which is substantially similar to the tube 23, and the other parts are 'connected up in the same way as before. In this construction the materials are fed as in the other form, from the rotating chute directly onto the surface .of the bell 42, which isl lnised as desired to drop the materials into the furnace.' The bell 7 operates in 'the same ymanner as before, being raised, if desired, into the position shown in dotted lines, and carrying with it thetbell 42.

We will now describe the means which we have' illustrated in Figs. 3, 5 and 6, for manipulating the levers 25, 26 and 27 in a predetermined manner in such a way that it can be accomplished by unskilled' labor. The 4cylinders 29, 30, 31 and 32'are supplied wit-h Huid under pressure through pipes. 44, 45, 46, 47 V and 48, the pipes 46 and 47 leading respectively to the upper and lower parts of the-cylinder 3l,

lWe will first describe our preferred means ,of controlling the admission of iuid through the pipes 46, 47.

and 48. These three pipes 'lead rom three valves 49,

is also provided, having a pair of stops 76 adapted to be -with an annular chamber 52, which communicates through ports 53 with the main portion of the valve.

Each valve is supplied with a double piston 54 which takes pressure in the center and is consequently balanced;` Through the inlet 55 all of the valves take pressure from a common supply pipe 56. Each valve is supplied with an exhaust-pipe 57. When the piston 54 is in the position shown in the let-hand valve 51in 5, the supply pipe 56 communicates-With the interior of the1 yvalve between the two portions of the piston, but is ,shut off from the ports V53 in an obvious manner. When, however, the piston is raised to the position shown in the valve 49 at the right, the pressure is admittedv through the ports 53 to the annular chamber 52, and trom there it is freely admitted to' the pipe 46 with which this chamber is connected. Upon the re- .turn oi the piston to the original position the valveand pipe are free to exhaust through the pipe 57. For operating these valves the three pistons are connected in any desired manner with piston rods 58, 59 and 60. These rods are provided with rollers 6l, 62 and 63 adapted to be operated by cams' 64, 65 and 66 respectively.

These cams rare all mounted at different angles upon a shaft 67 mounted in bearings 68. Upon the shaft rigidly Amounted with respectto the cams is aratchet wheel 69, and an operating lever 70 is also provided.4 This operating lever is provided with a pawl .71 for controllingthe ratchet in an obvious mannen A guide 72 placed in any desired one 'of a series of periorations 74 `in the guide. The three cams being set at the desired angle to each other and being provided with the requisite shape in order to produce the desired manipulations oi the bell 7, it will be necessary for the operator to merely rotate the shaft 67 by means of theoperating .lever 70 by a step-by-'step motion through the `operation oi the ratchet-wheel 69, and this will cause the bell to assume the three different positions and retain them for the length of time desired. The operation oi this part of our invention is as follows: Supposing the-iurnace manager to have decided to place three consecutive charges next to the furnace walls or on the outside,'

then three intermediate charges, and nally two in the center, the Whole number o-charges forming a cycle of eight in a series ot three, and one of two.' Each -of the ca ms would in this case be designed to have its circumference divided into eight parts, o which the cam 64 would have a continuous circular surface at a maximum distance from its vcenter equal to three oi these parts, or tlnee-eighths of the circumference. The4 cam 65 could be constructed in the same manner but would be located so that. the first one of these divisions would be adjacentto the last one of the divisions ofthe other cam. The cam^66 would be provided.- with two divisions of asimilar nature, would complete the cycle. The cams illustrated in Fig. '6 are designed in v this Way. The parts being fixed in this manner, the

operation oi the lever 70 eight times in order to rotate `the ratchet-wheel 69'to a complete revolution, would hold the distributing bell'7 in its normal iull-line position shownin Fig. l, during three movements oi the' lever, While three charges were introduced into the iurnace in a large annular ring next to the lining. As soon as the valve 49 is closed by the rotation oi-the cam'64, the cam is in position to operate on the roller 62 and similar automatic manner.

'open the valve 50 so as to introduce pressure through the pipe 47 to the lower part ofthe cylinder 3l. This willfbring the bell 7 into the lower dotted position. When three charges have been delivered in this manner at a point intermediate between the center and circumference oi the furnace, the cam 66 be .ready to apt upon the roller 62, and, admitting pressure to the top oi the cylinder 32, causes the bell 7 to rise to its upper dotted-position andl distribute the next two charges in the center oi the furnace. In like manner any cycle desired can be produced by substituting proper cams. Thus a tivecharge cycle should have cams divided into fifths distributed among three cams 64, 65A andv 66, shown in Fig..7, in the desired n ianner.y kIn all cases tlie number of cam lengths should be evenly divisible b V the number'oi charges forming the cycle.

v n Fig. 8 isillustrated another set'o cams 64b, 65b and 66h, in which three charges are distributed in the lirst position of the bell, two charges inthe second, and one in the third. The number of teeth on the ratchet- Wheel 69 corresponds with the number of' divisions into y which the cams are divided, there being eight in the form shown in Figs. 5 and 8, and tive in the form shown in Fig. 7. The object of the stops73 is to adjust the movement 'of the lever 70 to suit the ratchet-wheel. In practiceit is -best to allow the llever to'move the Wheel about one and a half ratchet lengths in order not to miss picking upthe next tooth. The advantage-of this device for automatically locating the spreader bell 7 isthat it does not depend upon the memory or faithfulness 'oi the man who actually charges the material into the furnace, but irs-necessarily made to operate automatically in accordance with the Vjudgment and predetermined plan ot the furnace manager. The lever 70 is also provided with attachments by which the control of the cylinder 30 and tliebell l0 is provid ed in a A link .75 is connected with the'lever'and with another lever 76 which operates a three-way valve 77.4 'This valve is provided with an admission-pipe 78, an exhaust pipe 79, and is connected with the pipe 45 so as to automatically control the 'admission of pressure lfluid to the cylinder 30.

The operation oi the cylinder 29 is controlled in another manner, which will now be described. A track 80 for a skip-car Slis located in the usual manner near the iurnace, and may be of any desired kind and construction. lNear this track are located a pair of sprocket.- whecls 82 and 83, having arms 84 and 8.5 respectively. These Wheels are connected together by a sprocket chain 86, and the arms are located in such position as to be readily -operated by the wheels of the skip-car when it reaches the proper positionso as to turn the sprocket-wheels for `a purpose to 'be described. A

second. sprocket wheel 37A isrigidly mounted with respect to -the sprocket-Wheel S3, and is connected by a chain 88 with a sprocket-wheelA 89. The last-mentioned sprocket-wheel is mounted on ashait 90 and is provided with two arms 9l-and 92. The second of these arms is connected with a cock 93 in the supplypipe 44, and itwill be seen that the operation of the Wheel of the skip-car in turning the arm S5, will rotate the'shaft 90 sufliciently to open the cock 93 and admit pressure to the cylinder 29 so as' to open the bell 1S. The other arm 91 is connected by a link 92 with a valve 93 in a supply-pipe 94 which controls the admission of steam to an operating engine or motor 95. This engine may be of any desired kind and character, but I prefer" a pair of Westinghouse standard engines of the ncloseth type coupled with cranks at 90 degrees. They trans.- mit power to Vthe pinion 16 Athrough gearing 96 andra shaft97.v l -j The operation of this part of our invention is as' i017," lows: If the rotary mixer l1 is in slow rotation caused by the engines running on ahy-pass valve (the enginesr havinglixed eccentrica), when theskip-car arrives at the point indicated .in Fig. 3` the forwardfiarw f el A encounters the arm 85, depressing it, .and vtlroyvs tlieJ arm 91 to admit more steam to the ellgiriesan'd-time accelerate the rotation oi. the chute. "The saine-'action oi the wheel of the sln'p-car operates'thearmQZ and admits pressure to the :cylinder 29, and italso moves the arm 84 upwardly into such position that when the skip-car returns it will .behit by the rear wheels of the skip-car and return to its normal positiomactuating the other parts in an obvious manner tobring them to the positions in which they originally were. f These operating devices have beeuillustratedand described as convenient for accomplishing the,- desired results, but it is to be understood that they may A be greatly modilied or replaced by equivalent devices'in order to'l carry out the invention within the .scope of the ap? pended claims. i

Having thus described our invention, we claim as new and desire to secure by Letters Patent:

i. ln a' charging device, the combination of a hopper forl receiving material,v a bell for controlling the discharge of material therefrom,-a rotary' mixer for leading the material to said lhoppery said mixer being provided'with radial projections upon its inner surface, and means 4for ro tatinf..y said mixer. I i ,1

l, ln a charging device, the combination of ahypass chamber, a bell for partially closing the lower end thereof, moans for moving the bell to positions above and .below sail'. lower end, a distributing ringlocated below the, lower end of the chamber, a hopper located at the upper part of said chamber, a bell for controlling thedischarge of material from said hopper, a mixer located above said hop, per, and an upwardly movable bell for controlling the disy4 'charge of material from the mixer to the hopper. v

3. In a charging device, the combination of a by-pass chamber, a bell for partially closing the lower end thereof, means for moving the bell to positions labove and below said lower end, a distributing ring located below theiower end of the chamber, a hopper located at the upper part of said chamber, a bell for controlling the discharge of mate-A rial 'from said hopper, a mixer locatedV above said hoppen, an upwardly movable bell for controlling the discharge of material from the mixer to'the hopper, a gas sealbetween said hopper and mixer, andv means for rotating the mixer.'

4. In a blastfurnace charging apparatus, the combination of a lay-pass chamber,`a bellfor partially closing the lower end thereof, and means for moving the bell to posilions both above and below the lowerv end of the chamber,

' said means ,comprising a lever connected with the.bell, a

'piston connectedi with the lever, a movable cylinder in which said piston-Q is located, a second piston rigidlycol'l? nccted with the cylinder, and a stationary cylinder` in which said second piston is located. l

In a blast furnace charging apparatus, the combinal tion of a byvpassvchamber, a bell for partially vclosing the lower end thereof, and means for movingthe bell to posilions both above and below the lower end of the chamber-, said moans comprising a lever connected with thebell, ,a pistou connected with the lever, a movable cylinder in which said piston is located. a second piston rigidly con-` nected with the cylinder, a -stationary cylinder in which said second piston is located, ,a hopper above said bypass chamber, a bell for controlling the discharge of material` acepta from the saidhopper, tothe by-pass chamber, and means [for operating said last-mentioned bell, comprising a lever -connectedtherewith, a piston connected with the second lever, and a cylinder in which said 1ast-mfentioned piston `is adapted to operate. 'e

,1 tion* o'fdliy-pass c amber, a bell for partially closing the lower. en ,d thereof, means for moving the bell to positions -bothfabve and vhelowthe lowerjend of the chamber, said `mea-irs comprising a level' connected with .the bell, a piston 1connect'ed with-the, lever, a movable cylinder in which said "pist'on islocated, asecond piston rigidly connected with .the cylinder, ,a stationary cyllnderlin which said second, e piston is, located, a rotary mlxeradapted to discharge ma-` ofo'r controlling tlie discharge of material from' said mixer, and. means rior operating said last-mentioned bell comprislnga lever ,and a power-cylinder connected withth lever.

7. In a lblast furnace charging apparatus, the combina- .tion ofa tty-pass chamber-a bell for partially closing the lower end" thereof, means for moving the bell to positions both above and below the lower end of the chamber, said means comprising a lever connected with the' bell, a piston connected` with the lever, a movable cylinder in 'which said piston-is located, a second piston rigidly connected withf the cylinder and a stationary cylinder in which lsaid second piston -is located, and means for controlling ,the ad mission of pressure-duid to said cylinders, said means comvalves. 8. In a furnace charging apparatus, the combination of a bell, a movable rod connected with the bell for operatingit, a piston connected with the rod, a movablecylinder in which said piston is located, al second piston connected' with lsaid cylinder, `a stationary cylinder in which` said last-mentioned piston is mounted, a plurality of valves for ond cylinder, a series of cams for operating saidvalves; a shaft' upon which vsaid camsv are rigidlymounted, and means for simultaneously operating vthecanis. 9. In a furnace charging apparatus, ythecmbinatlon ori a bell and means for moving the hell comprising v.a pair of cylinders having pistons therein, a plurality of valves for controlling the admission of iiuid-pressureto said cylinders, a cam `for operating each valve, each of ysaid cams be,-l ing provided with a surface havlngfa radius equal to the maximum throw of the cams, the sum of said-surfaces on ,all the cams being substantially equivalent tol a complete' circle and the cams being set at such an anglev to .each other that ,one of them' is alwaysjn' position to cause a maximum throw. v

1l). In a furnace charging apparatus, the combination of a bell and means for moving the bell comprising a pair of cylinders having pistons therein, a'pluralityof valves for controlling the admission of fluid-pressure to said, cylinders, a cam for operating each valve, eacli'of said cams being provided with -asin-face having a radius equal to the Amaximumthrow of the cams, the sum of saidsurfaces on all "the cams being fsnbstantially equivalent to a complete circle -and the vcams being-set at such an'angle to each other that one of them is always inposition to cause a maximum throw,l a ratchet-wheel mounted with respect to said cams, an oscillating lever having a 'pawl for the engagenxent of said ratchet-wheel,and a guiding and limiting device for the lever.

11. ln a' furnace charging apparatus, the combination of two bells, a pressure cylinder for operating one of them, -two pressure cylinders' for operating1 the other, a series of valves for controlling the admission of pressure-duid t0 said pair of cylinders, a valve forv controlling the admission of pressure-fluid to the other cylinder, a series of earns for controlling said first-mentioned valves, a lever for controlling-the last mentioned valve, and means for simultaneously operating said cams and lever. I 12. In-a furnace charging apparatus, the combination of two bells for controlling the admission of a vcharge to the furnace, -a movable rod connected .with each bell, a' pressure-cylinder ,having -apiston'connected with one of the rods, a pair, otpressure'eylinders having a piston con- `In.` a'blast furigzace charging apparatus, vthe combinar.

--terial intosaid oy-pass chamber, an upwardlyopeningvbeli prising a series of vvalves and means for operating theA controlling the admission of iluidpressure`lnto the first-Q10; cylinder and into the upper vand lower portions of the s ec invv nected 4with'the other rod, means toradmitting a' uid to therst cylinder, means for admitting a fluid to the pair of cylinders, means for controlling said .iirst-mentioned means atingy said cams and said three-way cock.

" 13. 1n ,a furnace charging apparatus, the 'combix'iation of two bells, two movable rods 'one connected with Aeach bell, a piston connected with one 'of said rods a cylinder jin4 which said piston is located, a pistonrcon'nected with the other rod, a movable cylinder in ,which saidpiston is'loopening bell. for controlling the-discharge otmaterial from-"1' said mixer, meansfor operating said last-mentioned bellcomprising a lever'and' a power-cylinder connected with cated, a third piston connected with the movableV cylinder,

,V a stationary cylinder lin. which said third piston 'is located,-

means for controlling the admission 'of duid-pressure to the second and third cylinders comprising a series of valves and a series of'cams foroperatingfthe valves, means forcontrollingthe admissionot fluid-pressure to the 'irst-v` mentioned lcylinder comprisingacock and a lever for' operating it, a second lever, and connections trom'sad in whichsaid .piston is' located, afsecondpiston rigidly connected with the cylinder, a stationary cylinder in which said second piston is .located, a Vrotary mixe):A adapted to discharge material into said hopper, anv -upwardlythe lever, andv means -fo'r controlling the vadmission of operating Iinid to thalast-mentioned other twocylinders.V v

15. ln a blast furnace charging apparatus, the combination of a by pass chamber, a bell tor partially closing 'the lower end thereof, means for moving the bell` to posi tions both above 'and below the lowerend of the lby pass j the mixer'. i

`chamber, said means comprising a leverco'nnected with the bell, apiston connected -withthe lever, a movable cylinder -in which said piston is located, a second piston rigidly connected with the cylinder, a skip-car, 4a rotary mixer4 means for rotating the mixer, and means controlled by the movement lol? the skip-car `for controlling the rotation of 16. ln'a blast furnace charging apparatus, the com.

bination of a rotary mixer, a motor for rotating the mixer, a valve for controlling the admission of pressure-fluid to the motor, a skip-car track located adjacent to the furnace,

a. bell-'operatingV cylinder having a valve, an arm located cylinder` and vto the' adjacent to the skipfcar track and adapted to be. operated by a skip-car on the track, and means for transmitting motion from said arm to said valves for controlling them. comprising a three-way cock, lmeans for controlling the I .means for admitting a-fluid to the pair of cylinders comprising aplurality of valves and a plurality oilcams for j operating the valves, and means for simultaneously oper- 17. In a blastfurnace charging apparatus,l the combinationof a rotarymxer, a motor forro'tating the mixer, a valve for controlling the admission of pressure-fluid to the .motor,'a skip-car track located Aadjacent -to the fur' nace, a bell-operating cylinder having a valve, 4an arm located 'adjacent to the skip-car trackvand adapted to be operated by'a skip-car on tetrack, and'means for transmitting motionfrom said 'arm tosaid valves' for control- 'ling'J them, saidv means comprising a sprocket-'wheel connected with thecarm, a second sprocket-'wheeha chain for connecting the -sprockeirwheels, and means for connecting the second sprocket-wheel .with said valves.y

18; lA furnace v charging'-devi'cei comprising ,a movable mixer, a Avalve fory controlling the motion or the mixer,' a bell' within the mixer, a valve for controlling the motion A of the bell, a skip-car trackvlocated adjacent to the fur# nace, a pair of arms-located infthe path of the wheels of the skipcar, a .pair off-sprocket-wheels with respect to',

which said' armsjva're rigidly mounted, said arms being set lat angle to. each otherachan, for' connecting. said' lspro'cket-vvhe'els together,l a second pair of. sprocket-wheels '4 Ioneoi whichli's rigidly connected with oneotlthe rst pair, 4a chain for connecting the second: pair, azlink connectinglone -ofv said second pair., of sprocket-wheels, lwith one of said valves, and a link for connecting the same v sprocket-wheel 'with' the other valve:

19. A, charging apparatls, comprising a movable mixer, ,'a valve for controlling a motion ofthe mixer, a movable bell inthe mixer, a valve for controlling a motion of the bell, and means fqnsimulta'neously operating saidvvalves. 20. vAcha'rging apparatus, -comprising alh'opperhaving an open lower end,l a distributingbe1l, a distributing ring located below the lower end of said hopper, and means for tribnting ring.- d l 21. In 'a charging device, the combination of a by-pass above and below said lower end, a distributing ring moving saidbell 'to positions above and below said dislocated below the lower end of said bypa'ss chamber, a v

hopper located above said by-pass chamber, a rotary mixer located at the upper end of said hopper, and a bell for controlling the dischargey of materials, from said rotary mixer into said "hoppen "g i In testimony 'whereof we have signed our names to this specication inthe presence of two subscribing witnesses.

' THOMAS FRANCIS WITHERBEE.

l JOHN GILMAN. WITHERBEE. l -Wltnesses C. H. BnnNr,

v Luis MENA., 

